When rock operas by the Kinks and the Who were relatively new and Deep Purple was working with the Royal Philharmonic Orchestra, Pink Floyd entered the '70's with ATOM HEART MOTHER, a symphonic endeavor whose centrepieces are two long compositions divided up into movements. Starting out as a chord sequence written by David Gilmour, the title track became a sprawling masterpiece co-written and arranged by Scottish composer Ron Geesin. Throughout 20 minutes of movements titled"Breast Milky", "Funky Dung", and "Mind Your Throat Please", grandiose brass sections bubble over, otherworldly choruses strike a chord of impending doom and individual Floyd contributions pop up amid all the orchestration.

1. Atom Heart Mother
2. If
3. Summer '68
4. Fat Old Sun
5. Alan's Psychedelic Breakfast